Here are some suggestions from www.andreasmoser.wordpress.com.
- Turn off your mobile for a day. No, don't put it on silent, turn it off. And then leave it at home to make sure you don't get tempted.
- Explore your own neighbourhood by going for a walk and turning right at the first intersection, left at the second, right at the third, left at the fourth and so on.
The "5 things to do today" blog introduces my suggestions for an interesting day.